Tsunami may be generated by:

A) earthquakes that cause the seafloor to shift
B) landslides that displace large amounts of water
C) activity associated with volcanic eruptions
D) all of these may generate a tsunami

Tsunami

A series of large ocean waves generated by significant disturbances such as underwater earthquakes, volcanic eruptions, or landslides.

Seafloor

The bottom layer of the ocean, consisting of sediment, rock, and organic material, shaped by geological and biological processes.

Landslides

Gravitational forces causing the downward shift of earth materials, rocks, or debris along a slope.